Michigan Trout Unlimited “Position on Chumming”
Total Page：16
File Type：pdf, Size：1020Kb
Michigan Trout Unlimited “Position on Chumming” Background: Chumming has been practiced in Michigan to varying degrees by some anglers through the years, and at times, has been both lawful and prohibited. In recent years, the practice of chumming has been reported to be increasing, both in the number of people and in the volume of chum that is being used by each of them. It is a fishing practice that some anglers say works very well, while other anglers vigorously oppose the practice. Chumming involves luring or attracting fish by depositing chum -- fish eggs, corn, rice, noodles, maggots or oatmeal– into the water to get fish into a actively feed. It's often used to target rainbow (steelhead) trout with fish eggs. The prevalence of the chumming practice is causing conflicts due to its increasing in severity among some guides and recreational anglers and distribution on Michigan rivers. Left unaddressed, the problem will escalate and be significantly more difficult to manage later. MITU supports the Natural Resources Commission to ban chumming in Michigan. Current Issue: Michigan Trout Unlimited (MITU) is currently faced with deciding on a position on the practice of chumming. Very little “hard” data exists on the biological or sociological impacts of this practice, to help inform the Natural Resource Commission (NRC) with the decision-making process. This results in the impression that this is purely a “social” issue, where the NRC should simply evaluate the number in favor or opposed to chumming. This could not be further from the truth. Michigan Trout Unlimited “Position on Chumming” will therefore address the plausible risks and impacts that this practice could be assumed to pose, purpose the NRC use the “Precautionary Principle” to guide action, and confirm that approach bu presenting what other states have chosen to do on this issue. There are two significant questions that need to be asked in the debate that must be considered. 1. Where the practice of chumming is allowed, what are the effects on the fishery? 2. Where the practice of chumming is allowed, what outcomes do other anglers experience? To date, there has been very little scientific research conducted on the effects of chumming on a fishery when chumming is practiced. The Michigan Department of Natural Resources has not undertaken research on chumming which would justify an exception to regulations limiting how fish may be taken. However, the Oregon Department of Fish & Wildlife Restoration and Enhancement Board commissioned the Institute of Marine Research to study “Effects of Commercially Available Egg Cures on the Survival of Juvenile Salmonids” (http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0021406). This research concluded sodium sulfite found in egg cures (preservatives), when ingested, increases mortality for juvenile salmon. Because the research was conducted in an Oregon laboratory, the Michigan DNR stated "may not represent what is practiced in Michigan” in Fisheries Order 200.16A submitted on April 18, 2016, resubmitted May 16, 2016 to the Natural Resources Commission (http://www.michigan.gov/documents/dnr/FO200.16A_524679_7.pdf?source=govdeliver y&utm_medium=email&utm_source=govdelivery). The Michigan fishing guidebook says it is unlawful to “Deposit litter, fish, offal or any foreign matter in any waters of the state or any lands, private or public.” Michigan TU believes this current prohibition is inclusive of chumming with fish eggs, corn, rice, noodles, oatmeal or maggots into the water of the State of Michigan, thus is unlawful under this rule. Risks & Impacts from Chumming Disease and Invasives Introduction/Spread The use of fish eggs as chum is a vector for the introduction and spread of new aquatic pathogens, fish diseases, and aquatic invasive species. Currently, there are no regulations or reporting of the use of chum, so we do not know the origin of fish eggs, what fish species the chum comes from, and what pathogens or invasive species may be coming on chum, in chum, or along with chum. MITU has learned that anglers get their fish eggs from local Michigan salmon and steelhead, out of state salmon eggs, and are buying large volumes of shad eggs from out of state. It is just as easy to assume Asian Carp processors in neighboring states might capitalize on markets for large volumes of fish eggs. Consequently, when the DNR conducts eDNA surveys, in the areas where chumming is practiced, to indentify the presents of Asian Carp, the DNR could be acquiring false positive results. None of the fish flesh tissue is being processed, regulated, or certified to ensure spread of pathogens or invasive species does not occur. Could there be a new fish disease carried on chum, or an invasive species like a larval New Zealand Mudsnail? Yes it plausible. For a DNR fish stocking permit, a certain level of disease certification assurance is needed – but chumming requires none. There is currently no assessment data on the volumes being used, the rivers fish eggs are used in, what fish species the fish eggs come from, and what states fish eggs were taken from. Chumming thus poses a real and feasible risk of being a vector of aquatic pathogen and invasive species movement. Ingestion & Chemical Toxicity The material, fish eggs or otherwise, that is used as chum, can be ingested by the target fish species, as well as non-target species, of all sizes, ages and species. Chumming introduces the material into the waters for digestion by all fish present. One large concern with chumming is the wide variety of curing chemicals that can and are used for fish eggs used as chum. Typical chemicals used in the curing of eggs for fishing, include salt, sugar, borax, sodium sulfite, formaldehyde, and other cures and scent additives. Anglers using cured fish eggs for bait have long used a plethora of precise and varying recipes for curing eggs. Michigan DNR lacks any regulation or knowledge as to what cures are currently being used, and would not have means readily available to enforce certain chemical prohibition. Some research from the western states where egg curing is widespread has indicated that sodium sulfite and even borax may have acute toxicity, yet no one has really explored subacute toxicity effects. Borax, a common laundry detergent booster, indicates on the box, “may be harmful if swallowed”, “contact a physician immediately if ingested”. Formaldehyde is a known and listed carcinogen. Michigan DNR currently lacks any control over, or knowledge of what chemicals are used in fish egg chum, and lack thorough research on their acute and subacute toxicity impacts to either the fish ingesting them, or citizens who consume fish that have been feeding on these chemically cured egg. From a fisheries perspective, this is of great concern as it could affect the health of our fish population; including juvenile Chinook salmon and even threatened juvenile lake sturgeon which bottom feed and are found in two of the rivers where chumming is most highly practiced. For human fish consumption health and safety, the DNR Fisheries Division or any other group have not conducted any testing for these chemicals, or studies to ensure consumption of fish post- chum ingestion is safe. In the absence of “hard data” on this risk/impact mechanism, the precautionary approach is warranted until hard data proves it to be safe. Angler Satisfaction, Expectations, and Unequitable Spread of Catch Perhaps the clearest mechanism of impact from chumming comes from the reallocation of target fish catch success among all of our anglers. The cost and effort of high volume chumming is only worth it to those practicing it because it produces significantly higher catch rates. This practice is currently occurring most intensively, for steelhead fishing, of which steelhead runs are of finite supply (particularly in recent years). It has also arisen in places where the prime fishing spots are of finite supply (e.g., below dams or prime spawning areas). This is being employed as a tactic for some anglers and guides to out compete others for finite steelhead and finite prime fishing spots. The enhanced success of those practicing chumming, can lead to lower success for other anglers via several mechanisms. First, those practicing chumming catch a larger percent of the fish present in prime spots, leaving less available for anglers that follow thereafter. Second, remaining fish have been able to feed sufficiently on chum eggs, thereby lowering their need to feed thereafter. Third, the abundance of egg chum in the prime spots can make fish selective only to eggs, thereby lowering their susceptibility to other fishing techniques. Fourth, many anglers are avoiding the areas where the race to prime lies and excessive chumming occur, to avoid the competitive anxious setting that effects their objective of a quality experience, thereby being relegated to less productive fishing areas. MITU has learned from recent coldwater fish species angler surveys, that high quality aesthetic experiences rank as the number one most common and universal aspect of a fishing experience a majority of Michigan anglers seek (this is verified by a recent DNR survey as well as an MSU study). The competitive race for fish catch rates and prime spots that can be fostered by chumming, along with the imbalance of equitable spread of catch rate success among anglers, poses a threat to the sustainable satisfaction of our anglers. If these factors occur, it is unclear today, whether dissatisfied anglers will: 1.) Go somewhere else where chumming isn’t as prevalent; resulting in a loss of economic benefit to certain communities; 2.) Make less frequent angling trips for species like steelhead (resulting in less economic benefit to Michigan from our fisheries; 3.) Eventually let discouragement over their lack of success lead them to less participation in angling and more attrition from license purchasing.